Mazda CX-7 2007 Workshop Manual page 160

STEP
16 INSPECT OPERATION OF PURGE CONTROL
SOLENOID VALVE
• Turn the ignition switch off.
• Connect the vacuum pump to the purge control
solenoid valve and apply vacuum to the
solenoid.
• Verify that the solenoid holds vacuum.
• Turn the ignition switch to the ON position
(Engine off).
• Access EVAPCP PID in the SIMULATION
TEST using the M-MDS.
• Set duty value to 100% for the EVAPCP PID.
• Apply vacuum while turning the solenoid from
OFF to ON and simulating the EVAPCP PID
with a 100% duty value.
• Verify that the solenoid releases vacuum while
the solenoid is turned on.
• Is the purge control solenoid valve operation
normal?
17 INSPECT PCV VALVE OPERATION
• Turn the ignition switch off.
• Remove the PCV valve and inspect the valve
operation.
(See01-16-14 POSITIVE CRANKCASE
VENTILATION (PCV) VALVE INSPECTION[L3
WITH TC].)
• Is the PCV valve operation normal?
18 INSPECT OPERATION OF EGR VALVE
• Remove the EGR valve.
• Visually inspect the if EGR valve is stuck open.
• Is the EGR valve stuck open?
19 VERIFY FUEL PUMP SPEED CONTROL
OPERATION
• Perform Fuel Pump Speed Control Inspection.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Does the fuel pump speed control work
properly?
20 INSPECT FUEL PRESSURE (HIGH-SIDE)
• Access and monitor the FUEL_PRES PID.
• Is the FUEL_PRES PID value within the
specification?
(See01-40-6 PCM INSPECTION[L3 WITH
TC].)
21 IDENTIFY CAUSE BY FUEL PRESSURE
SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance
normally?
22 INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
(See01-40-35 FUEL PRESSURE SENSOR
INSPECTION[L3 WITH TC].)
• Is the fuel pressure sensor normal?
23 INSPECT HIGH PRESSURE FUEL PUMP
• Replace the high pressure fuel pump
• Monitor FUEL_PRES PID
• Is the FUEL_PRES PID value within the
specified?
(See01-40-6 PCM INSPECTION[L3 WITH
TC].)
01-02–118
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Replace the purge control solenoid valve, then go to Step
26.
Yes Replace the PCV valve, then go to Step 26.
No Go to the next step.
Yes Repair or replace the EGR valve, then go to Step 26.
No Go to the next step.
Yes Go to the next step.
No Inspect or replace the malfunctioning parts, according to
inspection results.
Then go to Step 26.
Yes Go to Step 24.
No Go to the next step.
Yes Go to the next step.
No Go to Step 23.
Yes Go to the next step.
No Replace the fuel delivery pipe, then go to Step 26.
Yes Go to Step 26.
No Go to the next step.
ACTION